cas·tel·lan noun — the keeper of a castle: the officer entrusted with the keep, the stores, the records and the watch.
Not the lord, not the hero at the gate: the one who makes sure everything that matters is accounted for, defended, and ready. That's the work.
Castellan Limited is a New Zealand company, founded in 2026 by a working critical care paramedic — decades of frontline experience put directly into the design. The products began the way the best field tools always have — because the person who needed them couldn't buy them anywhere.
That origin isn't a story for the website; it's the development process. Every screen is tested where it has to work: gloved hands, moving vehicles, rotor noise, no coverage, 2 a.m. When something is clumsy at the roadside it gets rebuilt that week — not filed in a backlog by someone who has never held a drug safe key.
Our mark is a shield holding a heartbeat: the keep and the watch. The trace is drawn correctly — clinicians read rhythm strips for a living, and a brand that gets the QRS wrong has told them everything they need to know about its attention to detail. Navy for the watch, amber for the signal.
Two products are in active development and field testing: the field record (product name announced soon) and QuarterMaster, the equipment register — with the dashboards that give a service its live operational picture. One record underneath all of it — built in New Zealand, for any ambulance service anywhere, each on a dedicated database of its own.
And the field doesn't stand still, so neither do we: we are constantly evaluating the latest technology — on-device AI, connected monitors and devices, new ways to capture and carry the record — and integrating what earns its place. The bar for admission never moves: it has to work with no signal, and a clinician confirms everything.
Names, pilots and availability will be announced as they're ready; if you want the early conversation, write to us.